JP4669115B2 - Device for removing the printing sleeve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus and a method for removing a sleeve-shaped rubber blanket or a sleeve-shaped plate from a printing machine cylinder according to the superordinate concept of claim 1.
[0002]
[Prior art]
In the offset printing machine described in US 5,429,048, the material web to be printed is guided through a series of printing mechanisms. Each of the printing mechanisms has an impression cylinder which can be configured as a plate cylinder, a rubber cylinder and a second rubber cylinder. A flat, image-bearing plate can be attached to the plate cylinder. A sleeve-shaped rubber blanket can be fixed around the rubber cylinder. The plate cylinder and the rubber cylinder are supported in the frame of the printing mechanism. The section of the frame in contact with one axial end of the rubber cylinder is movably arranged and can be opened, thus releasing one end of the rubber cylinder. A removable sleeve-shaped rubber blanket can be moved axially through an opening in the frame. Further, a plurality of air conduits are provided inside the rubber cylinder described in this document, and air is guided to the outer surface of the rubber cylinder by these air conduits. In this way, air flows from the inside of the rubber cylinder loaded with pressurized air to the inner surface of the rubber blanket and is therefore stretched while it is inserted into the rubber cylinder. After inserting the rubber blanket into the rubber cylinder, the supply of pressurized air can be shut off. The rubber blanket then contacts the outer surface of the rubber cylinder and tightens the rubber cylinder firmly. In order to remove the rubber blanket, the rubber blanket is again loaded with pressurized air and pulled out at start-up.
[0003]
The disadvantage of the printing machine described in this document is that the inner surface of the rubber blanket or the outer surface of the rubber cylinder is fouled by, for example, ink or other substances that remain unintentionally attached to the inner surface of the rubber blanket. That is. This makes it difficult to remove the rubber blanket by loading the inner surface of the rubber blanket with pressurized air and pulling the rubber blanket in the axial direction. In addition, manufacturing defects and ambient conditions such as humidity and temperature can make removal of the rubber blanket difficult.
[0004]
U.S. Pat. No. 4,913,048 describes a printing machine having a sleeve-shaped plate without a passage and capable of being provided with a printed image. This sleeve-shaped plate can be pulled out of the plate cylinder in the axial direction and can be brought onto the plate cylinder by stretching of the plate due to the pressure of the pressure medium. The sleeve-shaped plate is then manually placed on the plate cylinder and the pressure is released. In this case, the same disadvantages as in the printing machine described in US 5,429,048 arise.
[0005]
US 5,745,968 describes an apparatus for mounting a sleeve-shaped plate on a base of a rubber cylinder supported in a cantilever manner, which has a conical ring member fixed to a substrate via a spacer. The ring member can be inserted snugly into the inner chamber of the sleeve-shaped plate. In this case, the penetration depth of the ring member into the inner chamber of the sleeve-shaped plate is limited by the lip-shaped ring arranged on the conical ring member, and the sleeve-shaped plate is inserted when the sleeve-shaped plate is inserted. An unpleasant whistle-like noise caused by air flowing out for the expansion of the air is attenuated. This tool is not suitable for completely inserting the sleeve plate on the rubber cylinder base or for pulling out the sleeve plate arranged in a rubber cylinder form from the rubber cylinder.
[0006]
[Problems to be solved by the invention]
It is an object of the present invention to provide an apparatus that facilitates the axial removal of rubber blankets and other printing sleeves.
[0007]
[Means for Solving the Problems]
This problem is solved by the features of claim 1.
[0008]
【The invention's effect】
The device according to the invention significantly facilitates the removal of the print sleeve by the operator.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Advantageous embodiments of the invention are as described in the dependent claims.
[0010]
A first embodiment of a device for removing a printing sleeve according to the invention has a first clamping arm and a second clamping arm movable relative to the first clamping arm, the ends of these clamping arms being Pliers are formed to grip the print sleeve.
[0011]
This device is advantageously insertable through an opening in the side wall of the printing machine and assists the operator in grasping the print sleeve at one end and pulling it out of the opening. In this way the device can be inserted quickly and easily, and the operator pulls out the rubber blanket or other printing sleeve in a very short time and without any physical pain or risk of damage, for example by sharp edges. Make it possible.
[0012]
A gripping chuck or pad is advantageously provided at the end of the clamping arm to enhance friction.
[0013]
In one embodiment of the invention, grips are located at the opposite ends of the clamping arm and the clamping arms are tightened by moving both grips towards each other. This embodiment provides a mechanical device for removing the printing sleeve that can be handled easily and easily.
[0014]
In another embodiment of the invention, a motor is provided for tightening the clamping arm, which advantageously rotates the gear that closes the clamping arm.
[0015]
The device according to the invention can be used in particular for an axially removable rubber blanket, as described in US 5,429,048 and US 5,323,702. The compressible outer layer of the rubber blanket ensures that the rubber blanket is gripped by the device, in which case the inner sleeve of the rubber blanket is compressed, causing inconvenient friction between the inner sleeve and the rubber cylinder. It does not occur and therefore it is not difficult to remove the rubber blanket. In addition, it is also possible for the device to grip the side of the sleeve opposite the rubber blanket for removal of the print sleeve, thereby avoiding damage to the rubber blanket surface or reducing the diameter somewhat. It is.
[0016]
For this purpose, the clamping arm preferably grabs the outer surface of the printing sleeve. Alternatively, the base of the printing sleeve, the so-called support sleeve, can also protrude beyond the end of the cylinder base, so that the clamping arm is opened inside the tube and creates a frictional force on the inner surface of the tube, thus The print sleeve can then be removed in a simple manner.
[0017]
In another embodiment of the invention, the device for removing the print sleeve is arranged on the drive side of the printing press, the drive side comprising a clamping mechanism for gripping the range of the drive end of the sleeve; And an adjusting member for moving the clamping mechanism and the sleeve in an axial direction away from the printing press drive side or toward the printing press drive side.
[0018]
The device according to the invention can also be used for other types of printing sleeves such as, for example, the plates or plate sleeves described in US 4,913,048.
[0019]
In the following description, “print sleeve” means both a rubber blanket and a plate sleeve.
[0020]
In another embodiment of the invention, the device for removing the printing sleeve is advantageously combined with at least one band, which is at least partially wound around the printing sleeve, and this at least one band. And a tightening device for tightening.
[0021]
Particularly advantageously in this case, the device has a first semicircular band and a second semicircular band. More than one band and / or more than one clamping device can be provided to produce a uniform pulling or pushing force on the print sleeve. In this manner, the risk that the print sleeve will remain stuck on the cylinder substrate upon removal can be minimized. Both ends of the band can be joined together by a tensioning device, so that the removal device can have a circular shape so that it can be fitted on the printing sleeve in the axial direction. This shape of the device according to the invention has the advantage that the device can be used quickly and easily and the printing sleeve removal work of the printing press operator is greatly facilitated.
[0022]
In another embodiment, the tensioning device according to the invention advantageously has a first side plate and a second side plate, on which the first and second pins are supported, respectively. . These pins are preferably fixed to the side plate in a non-rotatable manner, and at least one of the pins is fixed to a rotating rod or an operating rod. One end of the first band is preferably pivotably coupled to the first pin, and one end of the second band is advantageously pivotably coupled to the second pin Has been.
[0023]
The tensioning device is swiveled by turning a grip disposed on at least one pivot bar of the tensioning device, thus reducing the effective diameter of the circle formed by the first and second semicircular bands. . The two clamping devices are preferably operated to reduce the effective diameter. In this manner, by attaching the removal device around the print sleeve and operating the clamping device, the print sleeve can be securely grasped and pulled out or inserted in the axial direction.
[0024]
These embodiments of the present invention allow for effective removal of the print sleeve. This is because the pressure exerted on the printing sleeve is greater than in purely manual removal.
[0025]
One end of the printing sleeve can have, for example, a ridge or a somewhat larger diameter section. In this case, the diameter of the removing device can be made smaller than the outer diameter of the raised portion, and the removing device can be applied to the raised portion in the axial direction, so that no tightening force and friction force are required.
[0026]
When using the device for removing the printing sleeve according to the invention, the removing device is mounted around the printing sleeve and tightened so that the removing device tightly surrounds the printing sleeve and prints by pulling the removing device axially. The sleeve is pulled out in the axial direction. This ensures that the printing sleeve is removed reliably and effectively.
[0027]
More advantageously, the inner surface of the printing sleeve is loaded with pressurized air. Furthermore, the device according to the invention is advantageously used for a printing sleeve in the form of a rubber blanket of an offset printing mechanism. The step of tightening the removal device is advantageously performed as follows. That is, the compressible layer of the rubber blanket is compressed, so that the removal device has no effect on the inner support sleeve of the printing sleeve.
[0028]
The device according to the invention does not necessarily have to be used in the rubber blanket withdrawal process. For example, an operator of a printing machine may attempt to manually pull out the rubber blanket first and confirm that the rubber blanket remains attached to the cylinder substrate, for example by clamping. Only then can the operator use the device according to the invention. The same applies when the print sleeve is inserted.
[0029]
【Example】
In the following, the configuration of the present invention will be specifically described with reference to the embodiments shown in the drawings.
[0030]
In FIG. 1, a side view of a printing mechanism 1 of a web offset rotary press is shown. This printing mechanism schematically shows a left plate cylinder 2, a left rubber cylinder 3, a right rubber cylinder 4, and the like. And the right plate cylinder 5. A rubber blanket 13 detachable in the axial direction is attached to the left rubber cylinder 3, and this rubber blanket can be mounted on the rubber cylinder 3 in the form described in US 5,429,048. A rubber blanket 14 that is also removable in the axial direction is attached to the right rubber cylinder 4. During the printing operation of the printing mechanism 1, the material web, for example a paper web, is guided through a printing gap formed between the left rubber blanket 13 and the right rubber blanket 14. One or two doors 8 are arranged on the frame of the printing mechanism, which are opened in FIG. 1 and form one opening for removing the rubber blankets 13 and 14 in the axial direction. . However, the rubber blankets 13 and 14 sometimes remain attached due to, for example, manufacturing errors, dirt or ambient conditions such as humidity or temperature and can be difficult to pull out. The rubber cylinders 3 and 4 are preferably separable and can occupy positions that do not contact each other.
[0031]
In FIG. 2, a removal device 20 according to the invention is shown, which facilitates the removal of print sleeves, such as rubber blankets 13 and 14, if these print sleeves remain attached. To. The embodiment shown in FIG. 2 has a first band 22 and a second band 24, both of which are preferably approximately 2.5 cm (1 in) each, Made of steel or other metal. These bands are advantageously rigid per se and are adapted to fit into the circle of the print sleeve, via a first clamping device 26 at one end and a second at the other end. They are connected to each other via a tightening device 28. The first tensioning device 26 has a first side plate 32 and a second side plate 34. Between these side plates 32 and 34, a first pin 36 and a second pin 38 are advantageously fixed in a non-rotatable manner. The rotating rod 39 is coupled to the second pin 38 or forms an integral extension with the second pin 38. However, the pivot rod 39 can be non-rotatably coupled to one of the side plates 32 and 34. The diameter of the pin is approximately 0.478 cm (0.188 in), and the diameter of the pivot bar is approximately 0.795 cm (0.313 in). The pivot rod can be made of metal, such as steel. The side plates are also preferably made of metal, for example steel. The length of the pivot bar 39 is preferably approximately 38 cm (15 inches). A grip 37 is fixed to the other end of the rotating rod 39.
[0032]
Similar to the tensioning device 26, the second tensioning device 28 includes a first side plate 42 and a second side plate 44, a first non-rotatable pin 46 and a second non-rotatable pin 48. have. The rotating rod 49 is connected to the first non-rotatable pin 46 or forms an integral part of the first non-rotatable pin, and has a grip 47 at the other end. is doing.
[0033]
The removal device 20 has an effective diameter d equal to or slightly smaller than the outer diameter of the print sleeve to be removed, with the tightening devices 26 and 28 tightened. For example, to remove a compressible rubber blanket having a diameter slightly greater than 7.02 inches, the effective diameter d of the removal device can be, for example, approximately 7.02 inches.
[0034]
FIG. 3 shows the detaching device 20 shown in FIG. 2 in an untightened state that is axially fitted to the rubber blanket 14 shown in FIG. The rubber blanket preferably has a compressible layer 64 and an inner support sleeve 54. The compressible layer 64 is a composite having, for example, an incompressible layer made of a rubber material having substantially no pores and a compressible layer having pores, for example. The removal device 20 is fitted onto the rubber blanket by the operator of the printing machine.
[0035]
FIG. 4 shows a schematic side view of the removal device 20 clamped around the rubber blanket 14. The first tensioning device 26 and the second tensioning device 28 are operated by the printing machine operator so that the grips 37 and 47 of the rotary bars 39 and 49 shown in FIG. Operated by turning in direction.
[0036]
As shown in FIG. 5, the first band 22 is preferably wound around the second pin 38 and is rotatable about the pin 38. The second band 24 can rotate around the first pin 36. Accordingly, when the grip 37 (FIG. 2) that cannot rotate with respect to the pin and the side plate is rotated clockwise, the tightening device 26 is tightened from the position shown in FIG. 3 to the position shown in FIG. Is done. The effective diameter of the removal device 20 is reduced and the bands 22 and 24 are tightened around the rubber blanket 14. The compressible layer 64 is compressed so that the rubber blanket can be pulled axially out of the opening shown in FIG. The tensioning devices 26, 28 can optionally be further rotated clockwise so that the removal device 20 exerts a stronger pressure.
[0037]
In FIG. 6, an alternative embodiment of the present invention is shown. A large number of strip-shaped or band-shaped elements 80 which are themselves rigid are arranged on the ring base 82 at intervals in the circumferential direction, and are expanded toward the rubber blanket. Each element 80 is provided with a spring 81, which presses the associated element 80 against the sliding ring 84. The ring base 82 has one or more pulling rings 86 that allow the ring base 82 to be pulled in the direction of the printing machine operator. This alternative embodiment works as follows. The printing machine operator positions element 80 over the rubber blanket 14 and then moves the sliding ring 84 or tensioning device toward the rubber blanket 14 having a centerline 88. In this manner, each end of the element is crimped to the rubber blanket 14 in a direction toward the center line 88, and the rubber blanket 14 is gripped. The rubber blanket 14 can then be pulled out by the printing press operator pulling the pull ring 86 by hand.
[0038]
The first example was described as having two bands. However, it is possible to use only one band. As used herein, “printing sleeve” shall mean all types of sleeves used in printing machines, such as plates without passages or rubber blankets. “Band” shall mean an elongated object having any cross-section, for example a rectangular cross-section as described above, or a circular, cable-like cross-section.
[0039]
FIG. 7 shows another embodiment of the present invention. The removal device 100 for pulling out the printing sleeve shown in FIG. 7 has a first clamping arm 101 having a first end 110 and a second end 112. At the first end 110 there is arranged a gripping chuck 114 having a surface 115 which is preferably roughened.
[0040]
The second clamping arm 102 is constructed in one piece with the base 113 and has a first end 120, which also preferably has a roughened surface 125. A gripping chuck 124 is disposed. The second end 112 of the first clamping arm 101 is preferably non-rotatably coupled to a gear 134 which is supported on the base 103 so as to be pivotable about a pin 113, for example. . The drive gear 135, which is also pivotably supported on the base 103, is engaged with a gear 134 and is connected to, for example, an electric motor, which drives the drive gear 115 in a known manner.
[0041]
As the drive gear 135 rotates, the gear 134 rotates to open and close the clamping arm 101 with respect to the clamping arm 102.
[0042]
To pull out the print sleeve, the clamping arms 101, 102 are inserted by the printing machine operator through the opening on the operation side of the printing mechanism and fitted around the printing sleeve. Alternatively, the take-off device of FIG. 7 can operate under robot control instead of being manually operated by a printing press operator.
[0043]
As shown in FIG. 10, both ends 110 and 120 of the clamping arms 101, 102 are advantageously—but not necessarily—bent and curved depending on the size of the rubber blanket 14 or the printing sleeve. It is adapted to. Next, the drive motor is energized, the rotation of the drive gear 135 in the counterclockwise direction causes the gear to rotate in the clockwise direction, the tightening arm 101 is rotated about the axis of the pin 113, and the gripping chuck 114. 124 grab the rubber blanket 14.
[0044]
FIG. 8 shows another pliers-like embodiment of the removal device 200 according to the invention, which has two clamping arms 201, 202 that are pivotable about a pin 213. Grips 212 or 222 are arranged at the respective ends of the clamping arms 201, 202 so that the printing machine operator can close the clamping arm of the pick-up device and thus easily pull out the printing sleeve. Can do. Further gripping chucks 214 and 224 can be provided, and these gripping chucks are preferably constructed in the same manner as the gripping chucks 114 and 124 described in connection with FIG.
[0045]
FIG. 9 shows an alternative embodiment of a gripping chuck that can be used in place of the gripping chucks 114 and 124. This gripping chuck 414 has teeth 415 which provide additional gripping action and are therefore particularly suitable for use in the case of rubber blankets. This is because these teeth can be made, for example, of hard elastomer or metal and can penetrate into the rubber layer, but advantageously the rubber layer is not damaged.
[0046]
FIG. 11 shows another embodiment of a detaching device 300 according to the present invention arranged on the drive side, which detaching device is used to facilitate the withdrawal of the printing sleeve by the printing machine operator. Can be used with examples or used alone. For this purpose, the printing mechanism 1 has a drive-side frame 301 on which the rubber cylinder 4 is supported in a cantilever manner. A rubber blanket 14 having an inner sleeve or support sleeve 54 and one or more compressible layers 64 is mounted on the outer surface of the rubber cylinder 4 or more precisely the base of the rubber cylinder. The rubber blanket 14 can be driven by a drive shaft 6 coupled with a transmission 16.
[0047]
The drive-side removal device 300 includes a guide bush 306 that is fixed to the frame 301 and surrounds the drive shaft 6. The drive shaft 6 can freely rotate within the guide bush 306 without contact or via a bearing. An adjustment disk 307 is slidably disposed on the guide bushing 306 and is movable back and forth along the guide bushing 306 by one or more pneumatic cylinders 308. The clamping arms 302 and 303 are moved with respect to the adjusting disc 307 in the radial direction, for example by two cams 309, 310 arranged on the guide bushing 306.
[0048]
14 is a cross-sectional view taken along line XIV-XIV in FIG. The drive shaft 6 is disposed in a stationary guide bush 306. The adjusting disk 307 is moved along the guide bushing 306 via the sections 311, 312, where the sections 311, 312 are an integral part of the adjusting disk 307 or are fixed to the adjusting disk 307. The pneumatic cylinder 309 (FIG. 12) preferably acts on one of these sections 311, 312 for sliding the adjusting disk 307. Sections 311, 312 preferably have bearings that reduce friction along guide bushing 306.
[0049]
Cams 309 and 310 are fixed to the outer side of the bushing 306, and these cams are tapered in a direction toward the rubber cylinder 4, as shown in FIG. Yes. The clamping arms 302 and 303 are pressed against the cam 309 or 310 by springs 313 and 314. The clamping arms 302, 303 preferably have bearings that also reduce friction.
[0050]
As shown in FIG. 12, when the pneumatic cylinder 308 moves the adjustment disk 307 toward the rubber cylinder 4, the clamping arms 302 and 303 are inward in the radial direction of the cams 309 and 310 with respect to the adjustment disk 307. Due to the extending slope, the springs 313, 314 move radially inward. In this manner, the rubber blanket 14 is firmly held by the clamping arms 302 and 303.
[0051]
Next, as shown in FIG. 13, the rubber blanket 14 is slid over the rubber cylinder 4 during the subsequent movement of the adjusting disk 307. As shown in FIG. 12, the cams 309, 310 can be tilted radially outward at points 329, 330, thereby causing the clamping arms 302, 303 to move outward in the radial direction and rubber blankets. 14 is released. The rubber blanket can now be removed by hand by the printing machine operator or by the operating tool described in the previous embodiment.
[Brief description of the drawings]
FIG. 1 is a side view of a printing mechanism of a web offset rotary press.
FIG. 2 is a perspective view of a first embodiment of a removal device according to the present invention.
FIG. 3 is a schematic side view of the removal device shown in FIG. 2 positioned on a print sleeve before the removal device is tightened.
4 is a schematic side view of the removal device shown in FIG. 2 on the print sleeve in a tightened state.
FIG. 5 is a schematic side view of a tensioning device for the removal device shown in FIG. 2;
FIG. 6 is a cross-sectional view of another embodiment of the present invention.
FIG. 7 is a view showing still another embodiment of the present invention.
FIG. 8 is a view showing still another embodiment of the present invention.
9 shows an alternative grip chuck that can be used in the embodiment shown in FIGS. 7 and 8. FIG.
10 is a diagram schematically showing a grasping process of the embodiment shown in FIGS. 7 and 8. FIG.
FIG. 11 is a view showing still another embodiment of the present invention.
12 is a diagram showing the embodiment shown in FIG. 11 in a second position. FIG.
FIG. 13 is a diagram showing the embodiment shown in FIG. 11 at a third position.
14 is a cross-sectional view taken along line XIV-XIV in FIG.
[Explanation of symbols]
1 printing mechanism, 2 printing cylinder, 3 rubber cylinder, 4 rubber cylinder, 5 printing cylinder, 6 drive shaft, 8 door, 13 rubber blanket, 14 rubber blanket, 16 transmission device, 20 removal device, 22 first band, 24 Second band, 26 first tensioning device, 28 second tensioning device, 32 first side plate, 34 second side plate, 36 first pin, 37 grip, 38 second pin, 39 times Moving rod, 42 First side plate, 44 Second side plate, 46 First pin, 47 Grip, 48 Second pin, 49 Rotating rod, 54 Support sleeve, 64 layers, 66 arrows, 68 arrows, 80 elements , 81 spring, 82 ring base, 84 slip ring, 86 pull ring, 88 center line, 100 removal device, 101 first clamping arm, 102 second clamping arm, 103 110, first end, 112 second end, 113 pin, 114 grip chuck, 115 surface, 120 first end, 124 grip chuck, 125 surface, 134 gear, 135 drive gear, 200 removal device , 201 clamping arm, 202 clamping arm, 212 grip, 213 pin, 214 grip chuck, 222 grip, 224 grip chuck, 300 removal device, 301 frame, 302 clamping arm, 303 clamping arm, 306 guide bush, 307 adjustment disk, 308 Pneumatic cylinder, 309 cam, 310 cam, 311 section, 312 section, 313 spring, 314 spring, 329 points, 330 points, 414 grip chuck, 415 teeth, d effective diameter

Claims (10)

Positioning in the axial direction on the outer periphery of the printing sleeve (13, 14) in a device for removing the printing sleeve (13, 14), particularly the rubber blanket sleeve or plate sleeve from the cylinder base supported in a cantilever manner of the rotary press In addition, contact elements (22, 24 ; 201, 202 ) that can be applied to the outer peripheral surface of the printing sleeve (13, 14) while generating a frictional force are provided , and the contact elements (22, 24; 201, 202) and grips (37, 47; 212, 222) are provided. When the grips (37, 47; 212, 222) are manually operated, the contact elements (22, 24; 201, 222) are provided. 202) is equal to or adapted to be placed against the outer circumference surface of the printing sleeve (13, 14), the sleeve-shaped printing Three Apparatus to remove the.   The contact element is formed by a band (22, 24), which surrounds the printing sleeve (13, 14) and is clamped around the printing sleeve (13, 14) by a clamping device (26, 28). The apparatus of claim 1, wherein:   The band (22, 24) is generally made of a material which is itself rigid, and the shape of the band (22, 24) is adapted to the outer shape of the printing sleeve (13, 14), Item 3. The apparatus according to Item 2.   The tightening device (26, 28) includes first and second side plates (32, 34; 42, 44) and first and second pins (1 and 2) for connecting the first side plate and the second side plate to each other ( 36, 38; 46, 48), and the ends of the bands (22, 24) are fixed to these pins, and the first and / or second side plates (32, 34; 42, 44). 4. A device according to claim 2 or 3, characterized in that the band (22, 24) is tightened as it rotates.   One or more pivots with handgrips (37, 47) for the tightening device (26, 28) to pivot the first and / or second side plates (32, 34; 42, 44) Device according to claim 4, characterized in that it comprises a bar (39, 49).   The contact element is formed by a plurality of strip-shaped or band-shaped elements (80) which are generally self-rigid, these elements being supported by a ring base (82) and by spring-elastic means (81) By means of a sliding ring (84) which can be expanded towards the end facing the printing sleeve (13, 14) and which can be gripped relative to the element (80) by gripping the element (80) Device according to claim 1, characterized in that it is deformable in the radial direction towards the sleeve centerline (88) and thereby grips the printing sleeve (13, 14).   A contact element is formed by a first clamping arm (101, 201) and a second clamping arm (102, 202) movable relative to the first clamping arm (101, 201). 2. Device according to claim 1, characterized in that the end forms a pliers for gripping the printing sleeve (13, 14).   8. Device according to claim 7, characterized in that the first clamping arm (101, 201) and the second clamping arm (102, 202) are arranged pivotably with respect to each other.   9. Device according to claim 8, characterized in that the pivoting of the clamping arm (201, 202) is performed manually via a grip (212, 222) arranged on the clamping arm. A grip chuck (114, 124; 214, 224; 414) for enhancing friction is disposed at the end of the first and second clamping arms (101, 102; 201, 202; 302, 303). 10. Device according to any one of claims 7 to 9 , characterized in that it is characterized in that

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